What this Stellaris MCU brings to a control board
The Texas Instruments LM3S2965-IQC50-A2 is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris® family, clocked at 50 MHz with 256 KB of Flash and 64 KB of RAM.
50 MHz Cortex-M3 — enough for most control loops
The 50 MHz core handles a typical PID loop with CAN message handling without saturating the CPU.
256 KB Flash + 64 KB RAM — sizing the firmware
256 KB of program Flash and 64 KB of SRAM fit a moderate-complexity firmware stack: a CANopen or Modbus RTU slave, a simple RTOS kernel, and a few hundred lines of application code. The internal oscillator keeps the BOM lean for applications that don't require a precision clock source.
Industrial temperature grade and supply range
Rated for -40°C to 85°C ambient, with a supply range of 2.25 V to 2.75 V.
NRND — plan the BOM transition
The LM3S2965-IQC50-A2 is classified as NRND (Not Recommended for New Designs) with an EOL-hot lifecycle stage. Remaining supply is finite.
Peripherals and on-chip resources
On-chip peripherals include brown-out detection, power-on reset, PWM generators, and a watchdog timer — enough for a standalone controller without external supervisor ICs. The connectivity set covers CAN, I²C, IrDA, Microwire, QEI (for quadrature encoder inputs), SPI, SSI, and UART/USART, giving flexibility for motor feedback, sensor buses, and serial comms to a host controller.